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RFID is a common name for RFID, RFID is the abbreviation of Radio Frequency Identification

Update time:2022-12-12 09:41:46 / Views:78

RFID is a common name for RFID, RFID is the abbreviation of Radio Frequency Identification, and the term is radio frequency identification. Electronic tags, radio frequency tags, transponders, and data carriers; readers are also known as readers, scanners, readers, readers, communicators, and readers (depending on whether the electronic tags can rewrite data wirelessly) .

RFID is a common name for RFID, RFID is the abbreviation of Radio Frequency Identification

Detailed technical information and application scope of electronic tags


Electronic tags can be divided into 125KHZ low-frequency electronic tags, 13.56MHz915 high-frequency electronic tags MHz UHF electronic tags, 2.45GHz microwave electronic tags, 2.45GHz microwave electronic tags, and 5.8GHz microwave electronic tags.


The electronic label system consists of three parts:


Electronic tags (Tag): Each tag is composed of coupling elements and chips, with a unique electronic code, high-capacity electronic tags have a storage space that users can write, and are attached to objects to identify target objects;


Electronic tag reader (Reader): The device that reads (and sometimes writes) electronic tag information can be designed as a handheld or fixed type;


Antenna: The radio frequency signal is transmitted between the tag and the reader.


The working principle of electronic tags:


The basic working principle of RFID technology is not complicated: after the tag enters the magnetic field, it receives the radio frequency signal sent by the reader, and sends the product information stored in the chip through the energy obtained by the induced current (PassiveTag, passive tag or passive tag), or active Send a frequency signal (ActiveTag, active tag or active tag); after the reader reads and decodes the information, it sends the relevant data to the central information system.


The RFID (Radio Frequency Identification) system consists of two parts: a read-write unit and an electronic transceiver. The reader sends out electromagnetic pulses through the antenna, and the transceiver receives these pulses and sends the stored information to the reader in response. In fact, this is contactless reading, writing or erasing of memory data.


Technically speaking, "smart label; includes an RFID chip that includes a proprietary RFID radio frequency part and an ultra-thin antenna loop. The antenna is embedded in the label with a plastic sheet. Usually, a paper label is pasted on this label, and some important information can be It is clearly printed on the paper label. The current smart label is generally the size of a credit card, and there are 4 pieces of .5×4.5cm for small commodities, and round labels with a diameter of 4.7cm for CD and DVD labels.


Others, such as barcode or magnetic stripe ID Compared to the technology, the advantage of the transponder technology lies in the wireless link between the reader and the transponder: the reading and writing unit does not require visual contact with the transponder and can therefore be fully integrated into the product middle. This means that the transceivers are suitable for harsh environments and are insensitive to moisture, dirt and mechanical influences. Therefore, the transceiver system has high read reliability and fast data acquisition. The last point is to save labor and paper.


Physical characteristics of electronic tags:


Data storage: the capacity is larger than the traditional label (1) byte—1024byte), the data can be updated at any time, and it can be read and written.


Read and write speed: Compared with barcodes, there is no need to scan in a straight line, the reading and writing speed is faster, and it can recognize multiple targets and motion.


Easy to use: small size, easy to pack, and can be embedded in products.


Security: electronic chip, unique serial number, difficult to copy.


Durability: No mechanical failure, long service life and harsh environment.


Core Technology:


RFID radio frequency identification is a non-contact automatic identification technology. It automatically identifies the target object and obtains relevant data through radio frequency signals. The recognition work can work in various harsh environments without manual intervention. RFID technology can identify high-speed moving objects and multiple tags at the same time, and the operation is fast and convenient.


RFID electronic tags are a breakthrough technology:


First, a very specific object can be identified instead of only one type of object like a barcode;


Second, radio frequency can read data through external materials, and barcodes must read information through laser;


Third, multiple objects can be read at the same time, and barcodes can only be read one by one. In addition, the amount of stored information is also large. ;


The development history of electronic tags:


In 1937, the U.S. Naval Research Laboratory (NRL) developed the Identification Friend-or-Foe (IFF) system to distinguish Allied aircraft from enemy aircraft. The technology later became the basis of modern air traffic control in the 1950s. And it is the priority for early RFID military, laboratory and other technologies.


In the late 1960s and early 1970s (Electronic Article Surveillance (EAS)), this system was a common anti-theft system in shopping malls.


Early commercial applications included railroads and food traceability in the 1980s.


In the 1990s, standardization began to propose the concept of uniquely identifying each item in the EPC world.


China electronic label standard:


China's electronic label standard has always been the focus of attention at home and abroad, and it is also related to the core issue of whether it can promote the rapid development of China's RFID industry as soon as possible. On June 26, 2006, China's electronic label group learned at the working meeting of the electronic label standard working group held in Beijing that after joint efforts in 2007, 13 suggestions were put forward. The basic electrical characteristics of 56MHz radio frequency identification tags are 13.56MHz radio frequency Identifying readers/writers to regulate the physical characteristics of RFID tags, three standard technical documents.


The preparations for 2008 include the frequency of 840-845MHz and 920-925MHz draft standards, the 13.56MHz/radio frequency identification tag basic electrical characteristic test method, and the 13.56MHz radio frequency identification reader/writer test method. The draft standard of the RFID tag physical characteristic test method. Relevant leaders of the Science and Technology Department and the Product Department of the Ministry of Industry and Information Technology attended the electronic label working group meeting. The meeting was presided over by Ms. Zhang Qi, leader of the electronic label standard working group. At the meeting, the leaders of each topic group comprehensively summarized the work in 2007, and reported the work of formulating electronic label standards in 2008.


In the concluding speech of the meeting, the chairman clearly pointed out that the standard of electronic tags is related to RFID in the meeting. In the past year, everyone has done a lot of work realistically and made a lot of efforts. Although many problems have been encountered in the process of work, China has a vast development of RFID, so the application market must formulate its own standards. In 2008, the task groups of the electronic label working group must speed up their work.


Relevant departments and bureau chiefs in charge of industry and standards of industry and information technology who attended the meeting also stated at the meeting that they will actively support the work of the electronic label working group to promote the rapid development of China's RFID industry. At the meeting, the electronic label working group issued the "notice of releasing the technical guidance document of the electronic label standard working group; speed up the formulation of electronic label standards.


As a data carrier, electronic tags can play the role of identifying, tracking items and collecting information. Electronic tags have been widely used abroad. The RFID system composed of electronic tags, readers, antennas and application software is directly connected to the corresponding management information system. Each item can be accurately tracked, and this comprehensive information management system can bring many benefits to customers, including real-time data collection, secure data access channels, all product information in offline state, etc. In foreign countries, RFID technology has been widely used in industrial automation, commercial automation and other fields.


The application range of electronic tags in the industry includes:


1. Anti-counterfeiting: Generate detailed logistics records by scanning.


2. Production line management


Electronic tags can conveniently and accurately record process information and process operation information on the production line to meet flexible production needs. Recording labor numbers, times, operations and quality inspection results enables full production traceability. It also avoids errors caused by handwriting and viewing information in a production environment.


3. Warehouse management


The RFID system is used for intelligent warehouse goods management, which effectively solves the problem of warehouse goods information management. For large storage bases, the management center can understand the location and storage of goods in real time, which is of great significance for improving storage efficiency, feeding back product information, and guiding production. It not only increases the number of goods processed in a day, but also monitors all information of the goods. Among them, there are various forms of applications. Labels can be attached to the goods and read and written by the reader on the forklift and the reader at the corresponding position in the warehouse; barcodes and electronic tags can also be used together.


4. Sales channel management


Many enterprises strongly need to establish strict and orderly channels to effectively manage purchasing, sales and inventory. Products are embedded with electronic tags during production, including a unique product number. Manufacturers can use identifiers to monitor the flow of products, and wholesalers and retailers can use readers provided by manufacturers to identify the legitimacy of products.


Manage valuables


Can also be used for cameras, cameras, portable computer CD players, jewelry, etc. Anti-theft, settlement and after-sale protection for valuables. Its anti-theft function belongs to the Electronic Article Surveillance System (EAS). Tags can be attached to or built into item packaging. Dedicated shelf scanners will scan goods in real time and get real-time inventory records. If the goods are taken from the price, the system will verify that the action is legal. If the goods are taken away illegally, the system will alarm.


When paying out of the warehouse, all items of different categories can be scanned by the scanner at one time, and the anti-theft function will be released when the cashier generates a sales slip. That way, when a customer walks away with a purchased item, the alarm won't go off. When the customer pays, the cashier will write the sale date into the label, so that the items purchased by the customer can be guaranteed and promised accordingly.


6. Book management, rental product management


Putting electronic tags on books can easily receive book information, and there is no need to move books when sorting books, which can improve work efficiency and avoid work errors.


7. Logistics, car anti-theft, air parcel management, etc.


Picking system


The market prospect of China's electronic labels


China's electronic label market is in its infancy. Based on the application of electronic labels, it is mainly used for logistics management, medical industry, tracking management and monitoring of goods and dangerous goods, civil aviation luggage packaging management, mandatory inspection products, certificate anti-counterfeiting, road and bridge parking fees, electronic tickets etc.


The electronic label industry chain includes seven aspects: standard formulation, chip design and manufacturing, antenna design and manufacturing, chip packaging, development of reading and writing equipment and production system integration, data management software platform and application system development.


By 2006, China had formulated application standards such as "Technical Specifications for Integrated Circuit Card Modules" and "Construction Business" IC card application technology. In December 2006, the recommended national standard on the structure of the RFID animal radio frequency identification code was officially implemented. On April 20, 2007, the Ministry of Information Industry issued the 800/900MHz frequency band radio frequency identification (RFID) and issued the "Notice of Technical Application Trial Regulations".


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